ABA League system
The ABA League system or ABA/Adriatic League system pyramid is a series of interconnected competitions for men's professional basketball clubs in the Adriatic Basketball Association. The system has a hierarchical format with a promotion and demotion system between competitions at different levels.
The Adriatic Basketball Association comprises clubs from six countries in Southeast Europe, formerly Yugoslavia; Bosnia and Herzegovina, Croatia, Montenegro, North Macedonia, Serbia, and Slovenia.
Competitions
There are currently two different competitions on the pyramid - the 1st-tier ABA League First Division, the 2nd-tier ABA League Second Division, which comprises the lower level, respective national 1st-tier competitions.The ABA League First Division and the ABA League Second Division are organized by the ABA League JTD while the lower tier is organized by respective national federations.